Stovepipe.



riNrTnn sTaTns PATENT orrron.

MICHAEL A. FLAN N ERY, OF NEWPORT, KENTUCKY, ASSIGN OR TO THE E. H.HUENEFELD COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

STOVEPIPE.

Specification of Letters Patent.

Patented March 26, 1907.

Application filed December 24,1906. Serial Noy 349,206.

T0 @ZZ whom t .may concern:

Be it known that I, MICHAEL A. FLAN- NERY, a citizen of the UnitedStates, residing at Newport, in the county of Campbell and State ofKentucky, have invented certain new and useful Improvements inStovepipes, of which the following is a specification.

It is the object of my invention to provide a new and improved stovepipehavingv a locked joint made of the material of which the stovepipe iscomposed and located at that end of the length of the stovepipe arrangedto be inserted into the adjacent length of pipe; further, to provide alooked joint cut and bent from the insertible end of the stovepipe insuch manner that the bent portion may leave a space at said end adaptedto permit the further reduction in diame` ter at said insertible edge,so that the same may be readily inserted into the end of an adjoininglength of pipe.

The invention will be further readily understood from the followingdescription and claims and from the drawing,'in which latter- Figure 1is a perspective view of my improved stovepipe, partly broken away,showing the joint in separated relation. Fig. 2 is a similar view of thesame in finished relation. Fig. 3 is a side elevation of thelocking-corners of the stovepipe-blank. Fig. 4 is a plan view of thejoint, showing the same prior to the locking-tongue being bent intolocked position. Fig. 5 is a side elevation of the same. Fig. 6 is aninteriorperspective view of thelocked joint, and Fig. 7 is alongitudinal section of the locked joint on the line of Fig. 2.

A represents a section or length of stovepipe, and a is the seamthereof. The blank of which the stovepipe is composed is at one of itslongitudinal edges, 1, provided with an inwardv fold 2, adjacent towhich latter when folded there is a longitudinal reversely-bent portion3 for forming a pocket 4, provided with a mouth 5 between the extremeedge of the longitudinal inward fold and said reversely-bent portion. Abead 6 is thus also formed.

The other longitudinal edge, 7, of the blank at one of its ends isprovided with a rabbet S, having a bottom 9 and a side wall 10. The sidewall preferably flares -sidewardly from the said bottom toward the endof the pipe and toward the adjoining web of the pipe.-

The bottom of the rabbet merges into a sloping wall 11 for purposeshereinafter explained. The longitudinal edge 7 is provided with alongitudinal outward fold 12' for forming a pocket 13 with a side bead14. 'Ihe bottom of the rabbet S is preferably as wide as the pocket 13.The longitudinal outward fold 12 is adapted to be received through themouth 5 into the pocket 4 when the seam is formed, and when so receivedthe said inwardly and outwardly folded parts are compressed for formingthe seam and preferably in such manner as to make the inner face 15 ofthe pipe flush at both sides of the joint for said seam.

Preferably at the beginning of the reversely-bent portion 3 a slit 16 isformed at the insertible end of the pipe. This'slit separates theextreme end of the pocket 4 laterally from the lateral web of the pipefor forminga tongue 17. This slit maybe a simple incision in the pipe,or it may be wider, so as to form a recess at that point. The slitpreferably extends longitudinally from the insertible edge of thepipeas'far as the bottom 9 of the rabbet S. The tongue 17, being freefrom connection with the web of the pipe at both its sides, may readilybe bent inwardly and folded against the inner face of the seam forforming the lock. The bent tongue may in practice be compressed orhammered close against the inner face of the pipe. This cornpressing orhammering will also Hatten the insertible end of the bead 6 outside thesloping wall 11, so that an approximately flush surface is provided atthe insertible end of the pipe to permit ready insertion into the end ofa mating length of pipe.

Bending in the tongue 17 forms a recess 20 in the edge of the insertibleend of the pipe. This insertible end of the pipe is preferably reducedin Gross-section in suitable manner, as by being'provided withflutes'21. If it is desired to further reduce the extreme edge of theinser'tible end when inserting it into the exterior end of an adjoininglength of pipe, this insertible end may be compressed by manuallyforcing the side walls of the recess 2O toward each other, there beingsufficient spring in the metal to permit this, this manual compressionbeing released as soon as the insertible end is received by the end ofthe adjacent length of pipe.

It will be noted that the bead 14 when the seam a is compressed impingesthe reverselyroo bent wall 3 ofthe pocket 4 and that the longitudinaledges 7 1 impinge the inner walls of the beads 6 14. When the tongue 17is bent, these parts are locked in that position, with the bead 6impinging the side wall 10 adjacent the bottom 9 of the rabbet 8 on oneside of said tongue. At the other side of said tongue the bead 14 islaterally locked by the reversely-bent portion 3. In this manner theseam is securely held and locked against displacement of thelongitudinal edges ofthe pipe, so that the said seam at the insertibleend ofthe pipe may not collapse irrespective of pressure exerted uponthe pipe.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. A stovepipe having a longitudinal inward fold and a longitudinaloutward fold at its respective longitudinal mating edges for forming apair of pockets having inner and outer walls, one end of said pocketsbeing separated from the adjacent lside web of the pipe whereby a tongueis formed, the said tongue being bent upon the seam for locking saidseam. i

2. A stovepipe having reversely-bent longitudinal mating edges lappingeach other for forming a seam, one end of said seam being laterallyseparated Jfrom the adjoining web of said pipe, said separated portionof said seam bein bent upon itself for locking said seam and orming arecess at the end of said pipe.

3. A stovepipe having mating reverselybent longitudinal edges restingone within the other for forming a seam, one of said edges having itsend portion cut away for forming a rabbet, the other of said edgeshaving an incision therein adjacent said folded mating ends for forminga tongue composed of a less number of thicknesses than the seam of saidpipe, said tongue being bent upon said seam for forming a recess in theedge of said pipe, substantially as described.

4. A stovepipe having a longitudinal inward fold and a longitudinaloutward fold at its respective longitudinal mating edges for forming apair of pockets having inner and outer walls forming a seam, the end ofone of said pockets being cut away for forming a rabbet merging into adepending laterallysloping wall 11, the other of said pockets having itsend laterally separated from the adjoining web of said stovepipe forforming a tongue, said tongue being bent upon said seam, said slopingwall being received by one of said pockets in forming said seam, andsaid pocket being crushed adjacent said sloping wall when said tongue isbent upon said seam, substantially as described.

In testimonywhereof I have subscribed my name hereto in the presence oftwo subscribing witnesses.

MICHAEL A. FLANNERY.

Witnesses:

THEonoRE C. JUNG, CORDELIA OHEARN.

